/* Modern Development Station - Enhanced Styles */

/* CSS Custom Properties (Variables) */
:root {
  /* Colors - Light Theme */
  --color-primary: #3b82f6;
  --color-primary-dark: #2563eb;
  --color-primary-light: #60a5fa;
  --color-secondary: #10b981;
  --color-accent: #f59e0b;
  --color-danger: #ef4444;
  --color-warning: #f59e0b;
  --color-success: #10b981;
  --color-info: #3b82f6;
  
  /* Neutral Colors */
  --color-white: #ffffff;
  --color-gray-50: #f9fafb;
  --color-gray-100: #f3f4f6;
  --color-gray-200: #e5e7eb;
  --color-gray-300: #d1d5db;
  --color-gray-400: #9ca3af;
  --color-gray-500: #6b7280;
  --color-gray-600: #4b5563;
  --color-gray-700: #374151;
  --color-gray-800: #1f2937;
  --color-gray-900: #111827;
  
  /* Background Colors */
  --bg-primary: var(--color-white);
  --bg-secondary: var(--color-gray-50);
  --bg-tertiary: var(--color-gray-100);
  --bg-card: var(--color-white);
  --bg-overlay: rgba(0, 0, 0, 0.5);
  
  /* Text Colors */
  --text-primary: var(--color-gray-900);
  --text-secondary: var(--color-gray-600);
  --text-tertiary: var(--color-gray-400);
  --text-inverse: var(--color-white);
  
  /* Border Colors */
  --border-primary: var(--color-gray-200);
  --border-secondary: var(--color-gray-300);
  --border-focus: var(--color-primary);
  
  /* Shadow */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  
  /* Typography */
  --font-family-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --font-family-mono: 'JetBrains Mono', 'Fira Code', Consolas, 'Liberation Mono', Menlo, Courier, monospace;
  
  /* Font Sizes */
  --text-xs: 0.75rem;     /* 12px */
  --text-sm: 0.875rem;    /* 14px */
  --text-base: 1rem;      /* 16px */
  --text-lg: 1.125rem;    /* 18px */
  --text-xl: 1.25rem;     /* 20px */
  --text-2xl: 1.5rem;     /* 24px */
  --text-3xl: 1.875rem;   /* 30px */
  --text-4xl: 2.25rem;    /* 36px */
  --text-5xl: 3rem;       /* 48px */
  
  /* Font Weights */
  --font-light: 300;
  --font-normal: 400;
  --font-medium: 500;
  --font-semibold: 600;
  --font-bold: 700;
  --font-extrabold: 800;
  
  /* Line Heights */
  --leading-tight: 1.25;
  --leading-snug: 1.375;
  --leading-normal: 1.5;
  --leading-relaxed: 1.625;
  --leading-loose: 2;
  
  /* Spacing */
  --spacing-0: 0;
  --spacing-1: 0.25rem;   /* 4px */
  --spacing-2: 0.5rem;    /* 8px */
  --spacing-3: 0.75rem;   /* 12px */
  --spacing-4: 1rem;      /* 16px */
  --spacing-5: 1.25rem;   /* 20px */
  --spacing-6: 1.5rem;    /* 24px */
  --spacing-8: 2rem;      /* 32px */
  --spacing-10: 2.5rem;   /* 40px */
  --spacing-12: 3rem;     /* 48px */
  --spacing-16: 4rem;     /* 64px */
  --spacing-20: 5rem;     /* 80px */
  --spacing-24: 6rem;     /* 96px */
  
  /* Border Radius */
  --radius-sm: 0.125rem;  /* 2px */
  --radius-md: 0.375rem;  /* 6px */
  --radius-lg: 0.5rem;    /* 8px */
  --radius-xl: 0.75rem;   /* 12px */
  --radius-2xl: 1rem;     /* 16px */
  --radius-full: 9999px;
  
  /* Transitions */
  --transition-fast: 150ms ease-in-out;
  --transition-normal: 200ms ease-in-out;
  --transition-slow: 300ms ease-in-out;
  
  /* Z-Index Scale */
  --z-dropdown: 1000;
  --z-sticky: 1020;
  --z-fixed: 1030;
  --z-modal-backdrop: 1040;
  --z-modal: 1050;
  --z-popover: 1060;
  --z-tooltip: 1070;
  --z-toast: 1080;
}

/* Dark Theme */
[data-theme="dark"] {
  --bg-primary: var(--color-gray-900);
  --bg-secondary: var(--color-gray-800);
  --bg-tertiary: var(--color-gray-700);
  --bg-card: var(--color-gray-800);
  --bg-overlay: rgba(0, 0, 0, 0.8);
  
  --text-primary: var(--color-gray-100);
  --text-secondary: var(--color-gray-300);
  --text-tertiary: var(--color-gray-500);
  
  --border-primary: var(--color-gray-700);
  --border-secondary: var(--color-gray-600);
}

/* Reset & Base Styles */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-family-sans);
  font-size: var(--text-base);
  font-weight: var(--font-normal);
  line-height: var(--leading-normal);
  color: var(--text-primary);
  background-color: var(--bg-primary);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-weight: var(--font-semibold);
  line-height: var(--leading-tight);
  color: var(--text-primary);
  margin-bottom: var(--spacing-4);
}

h1 { font-size: var(--text-4xl); }
h2 { font-size: var(--text-3xl); }
h3 { font-size: var(--text-2xl); }
h4 { font-size: var(--text-xl); }
h5 { font-size: var(--text-lg); }
h6 { font-size: var(--text-base); }

p {
  margin-bottom: var(--spacing-4);
  color: var(--text-secondary);
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-primary-dark);
}

code {
  font-family: var(--font-family-mono);
  font-size: 0.875em;
  background-color: var(--bg-tertiary);
  padding: var(--spacing-1) var(--spacing-2);
  border-radius: var(--radius-sm);
  color: var(--color-primary);
}

/* Layout Components */
.container {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 var(--spacing-4);
}

@media (min-width: 640px) {
  .container { padding: 0 var(--spacing-6); }
}

@media (min-width: 1024px) {
  .container { padding: 0 var(--spacing-8); }
}

/* Header */
.header {
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
  background-color: var(--bg-card);
  border-bottom: 1px solid var(--border-primary);
  backdrop-filter: blur(8px);
  box-shadow: var(--shadow-sm);
}

.header-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 4rem;
  gap: var(--spacing-2);
  position: relative;
  flex-wrap: nowrap;
  overflow: hidden;
}

@media (min-width: 768px) {
  .header-content {
    gap: var(--spacing-4);
  }
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-2);
  font-size: var(--text-lg);
  font-weight: var(--font-bold);
  color: var(--text-primary);
  flex-shrink: 0;
  min-width: 0;
}

@media (min-width: 640px) {
  .logo {
    gap: var(--spacing-3);
    font-size: var(--text-xl);
  }
}

@media (max-width: 480px) {
  .logo {
    gap: var(--spacing-1);
    font-size: var(--text-base);
  }
  
  .logo span:not(.logo-icon) {
    display: none;
  }
}

.logo-icon {
  font-size: var(--text-2xl);
}

.nav-links {
  display: none;
  gap: var(--spacing-6);
}

@media (min-width: 768px) {
  .nav-links {
    display: flex;
  }
}

.nav-link {
  font-weight: var(--font-medium);
  color: var(--text-secondary);
  transition: color var(--transition-fast);
  white-space: nowrap;
}

.nav-link:hover,
.nav-link.active {
  color: var(--color-primary);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: var(--spacing-2);
  flex-shrink: 0;
  min-width: 0;
}

@media (min-width: 640px) {
  .header-actions {
    gap: var(--spacing-3);
  }
}

@media (max-width: 480px) {
  .header-actions {
    gap: var(--spacing-1);
  }
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
  display: block;
  background: none;
  border: none;
  color: var(--text-primary);
  cursor: pointer;
  padding: var(--spacing-2);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.mobile-menu-toggle:hover {
  background-color: var(--bg-secondary);
}

@media (min-width: 768px) {
  .mobile-menu-toggle {
    display: none;
  }
}

/* Mobile Navigation */
.mobile-nav {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background-color: var(--bg-card);
  border-top: 1px solid var(--border-primary);
  box-shadow: var(--shadow-lg);
  display: none;
  flex-direction: column;
  padding: var(--spacing-4);
  gap: var(--spacing-2);
}

.mobile-nav.active {
  display: flex;
}

.mobile-nav .nav-link {
  display: block;
  padding: var(--spacing-3) var(--spacing-4);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.mobile-nav .nav-link:hover {
  background-color: var(--bg-secondary);
}

/* Search */
.search-container {
  position: relative;
  width: 100%;
  max-width: 400px;
  flex-shrink: 1;
  min-width: 0;
}

@media (max-width: 640px) {
  .search-container {
    max-width: 180px;
  }
}

@media (max-width: 480px) {
  .search-container {
    max-width: 120px;
  }
}

@media (max-width: 360px) {
  .search-container {
    max-width: 80px;
  }
  
  .header-content {
    gap: var(--spacing-1);
    padding: 0 var(--spacing-1);
  }
  
  .logo {
    gap: var(--spacing-1);
  }
  
  .header-actions {
    gap: var(--spacing-1);
  }
  
  .search-input {
    padding: var(--spacing-1);
    padding-left: var(--spacing-5);
    font-size: var(--text-xs);
  }
  
  .search-icon {
    left: var(--spacing-1);
    width: 0.75rem;
    height: 0.75rem;
  }
  
  .theme-toggle {
    width: 1.5rem;
    height: 1.5rem;
    font-size: var(--text-xs);
  }
}

.search-input {
  width: 100%;
  padding: var(--spacing-2) var(--spacing-3);
  padding-left: var(--spacing-8);
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-lg);
  font-size: var(--text-sm);
  transition: all var(--transition-fast);
  min-width: 0;
}

@media (min-width: 640px) {
  .search-input {
    padding: var(--spacing-3) var(--spacing-4);
    padding-left: var(--spacing-10);
  }
}

@media (max-width: 480px) {
  .search-input {
    padding: var(--spacing-1) var(--spacing-2);
    padding-left: var(--spacing-6);
    font-size: var(--text-xs);
  }
}

.search-input:focus {
  outline: none;
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.search-icon {
  position: absolute;
  left: var(--spacing-2);
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-tertiary);
  width: 1rem;
  height: 1rem;
}

@media (min-width: 640px) {
  .search-icon {
    left: var(--spacing-3);
    width: 1.25rem;
    height: 1.25rem;
  }
}

@media (max-width: 480px) {
  .search-icon {
    left: var(--spacing-1);
    width: 0.875rem;
    height: 0.875rem;
  }
}

/* Theme Toggle */
.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2rem;
  height: 2rem;
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: all var(--transition-fast);
  font-size: var(--text-sm);
  flex-shrink: 0;
}

@media (min-width: 640px) {
  .theme-toggle {
    width: 2.5rem;
    height: 2.5rem;
    font-size: var(--text-lg);
  }
}

@media (max-width: 480px) {
  .theme-toggle {
    width: 1.75rem;
    height: 1.75rem;
    font-size: var(--text-xs);
  }
}

.theme-toggle:hover {
  background-color: var(--bg-tertiary);
}

/* Breadcrumb */
.breadcrumb {
  padding: var(--spacing-4) 0;
  border-bottom: 1px solid var(--border-primary);
}

.breadcrumb-nav {
  display: flex;
  align-items: center;
  gap: var(--spacing-2);
  font-size: var(--text-sm);
}

.breadcrumb-link {
  color: var(--text-secondary);
  transition: color var(--transition-fast);
}

.breadcrumb-link:hover {
  color: var(--color-primary);
}

.breadcrumb-separator {
  color: var(--text-tertiary);
}

.breadcrumb-current {
  color: var(--text-primary);
  font-weight: var(--font-medium);
}

/* Main Content */
.main {
  flex: 1;
  padding: var(--spacing-8) 0;
}

/* Tool Layout */
.tool-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-6);
  align-items: start;
  max-width: 1400px;
  margin: 0 auto;
}

@media (min-width: 768px) {
  .tool-layout {
    gap: var(--spacing-8);
  }
}

@media (min-width: 1024px) {
  .tool-layout {
    grid-template-columns: 1fr 340px;
    gap: var(--spacing-10);
  }
}

@media (min-width: 1280px) {
  .tool-layout {
    grid-template-columns: 1fr 380px;
    gap: var(--spacing-12);
  }
}

.tool-content {
  background-color: var(--bg-card);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-xl);
  padding: var(--spacing-6);
  box-shadow: var(--shadow-sm);
  min-height: 400px;
  position: relative;
  overflow: hidden;
}

@media (min-width: 768px) {
  .tool-content {
    padding: var(--spacing-8);
    min-height: 600px;
  }
}

.tool-content::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-fast);
}

.tool-content:hover::before {
  transform: scaleX(1);
}

.tool-sidebar {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-4);
  position: sticky;
  top: var(--spacing-6);
  max-height: calc(100vh - var(--spacing-12));
  overflow-y: auto;
}

@media (min-width: 768px) {
  .tool-sidebar {
    gap: var(--spacing-6);
    top: var(--spacing-8);
    max-height: calc(100vh - var(--spacing-16));
  }
}

.tool-sidebar .card {
  padding: var(--spacing-4);
  margin-bottom: var(--spacing-3);
}

@media (min-width: 768px) {
  .tool-sidebar .card {
    padding: var(--spacing-6);
    margin-bottom: var(--spacing-4);
  }
}

.tool-sidebar .card-header {
  margin-bottom: var(--spacing-5);
  padding-bottom: var(--spacing-4);
}

.tool-sidebar .card-icon {
  width: 2.5rem;
  height: 2.5rem;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
}

.tool-sidebar .card-icon svg {
  width: 1rem;
  height: 1rem;
}

.tool-sidebar .card-title {
  font-size: var(--text-base);
  font-weight: var(--font-semibold);
  margin-bottom: var(--spacing-1);
}

.tool-sidebar .card-description {
  font-size: var(--text-xs);
  line-height: var(--leading-relaxed);
}

/* Tool Header */
.tool-header {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-4);
  margin-bottom: var(--spacing-8);
  padding-bottom: var(--spacing-6);
  border-bottom: 1px solid var(--border-primary);
}

.tool-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 3rem;
  height: 3rem;
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
  border-radius: var(--radius-xl);
  color: var(--color-white);
  flex-shrink: 0;
}

.tool-info h1 {
  margin-bottom: var(--spacing-2);
}

.tool-description {
  font-size: var(--text-lg);
  color: var(--text-secondary);
  margin-bottom: 0;
}

/* Form Components */
.form-group {
  margin-bottom: var(--spacing-6);
}

.form-label {
  display: block;
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
  color: var(--text-primary);
  margin-bottom: var(--spacing-3);
  line-height: var(--leading-tight);
}

.form-input,
.form-textarea,
.form-select {
  width: 100%;
  padding: var(--spacing-3) var(--spacing-4);
  background-color: var(--bg-secondary);
  border: 2px solid var(--border-primary);
  border-radius: var(--radius-lg);
  font-size: var(--text-sm);
  color: var(--text-primary);
  transition: all var(--transition-fast);
  line-height: var(--leading-normal);
  box-sizing: border-box;
  font-family: inherit;
}

@media (min-width: 768px) {
  .form-input,
  .form-textarea,
  .form-select {
    padding: var(--spacing-4) var(--spacing-5);
    font-size: var(--text-base);
  }
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 4px rgba(59, 130, 246, 0.1);
  background-color: var(--bg-card);
}

.form-input:hover,
.form-textarea:hover,
.form-select:hover {
  border-color: var(--border-focus);
}

.form-textarea {
  resize: vertical;
  min-height: 120px;
  font-family: var(--font-family-mono);
  line-height: var(--leading-relaxed);
}

.form-select {
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 20 20'%3e%3cpath stroke='%236b7280' stroke-linecap='round' stroke-linejoin='round' stroke-width='1.5' d='m6 8 4 4 4-4'/%3e%3c/svg%3e");
  background-position: right var(--spacing-3) center;
  background-repeat: no-repeat;
  background-size: 1.5em 1.5em;
  padding-right: var(--spacing-10);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-4);
  align-items: start;
}

@media (min-width: 768px) {
  .form-row {
    grid-template-columns: 1fr 1fr;
  }
}

@media (min-width: 1024px) {
  .form-row-3 {
    grid-template-columns: 1fr 1fr 1fr;
  }
}

/* Form Help Text */
.form-help {
  font-size: var(--text-xs);
  color: var(--text-tertiary);
  margin-top: var(--spacing-1);
  line-height: var(--leading-normal);
}

/* Form Range Input */
.form-range {
  width: 100%;
  height: 6px;
  background: var(--bg-tertiary);
  border-radius: var(--radius-full);
  outline: none;
  -webkit-appearance: none;
  appearance: none;
  cursor: pointer;
}

.form-range::-webkit-slider-thumb {
  appearance: none;
  width: 20px;
  height: 20px;
  background: var(--color-primary);
  border-radius: 50%;
  cursor: pointer;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-fast);
}

.form-range::-webkit-slider-thumb:hover {
  transform: scale(1.1);
  box-shadow: var(--shadow-md);
}

.form-range::-moz-range-thumb {
  width: 20px;
  height: 20px;
  background: var(--color-primary);
  border-radius: 50%;
  cursor: pointer;
  border: none;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-fast);
}

.form-range::-moz-range-thumb:hover {
  transform: scale(1.1);
  box-shadow: var(--shadow-md);
}

.range-labels {
  display: flex;
  justify-content: space-between;
  font-size: var(--text-xs);
  color: var(--text-tertiary);
  margin-top: var(--spacing-1);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-2);
  padding: var(--spacing-2) var(--spacing-4);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  border: 1px solid transparent;
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: all var(--transition-fast);
  text-decoration: none;
  white-space: nowrap;
  line-height: var(--leading-normal);
  box-sizing: border-box;
  position: relative;
  overflow: hidden;
  min-height: 44px; /* Touch-friendly minimum */
}

@media (min-width: 768px) {
  .btn {
    padding: var(--spacing-3) var(--spacing-6);
  }
}

.btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
  transition: left 0.5s ease;
}

.btn:hover::before {
  left: 100%;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none !important;
}

.btn-primary {
  background-color: var(--color-primary);
  color: var(--color-white);
  border-color: var(--color-primary);
}

.btn-primary:hover:not(:disabled) {
  background-color: var(--color-primary-dark);
  border-color: var(--color-primary-dark);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn-secondary {
  background-color: var(--color-secondary);
  color: var(--color-white);
  border-color: var(--color-secondary);
}

.btn-secondary:hover:not(:disabled) {
  background-color: #059669;
  border-color: #059669;
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn-outline {
  background-color: transparent;
  border-color: var(--border-secondary);
  color: var(--text-primary);
}

.btn-outline:hover:not(:disabled) {
  background-color: var(--bg-secondary);
  border-color: var(--border-focus);
  color: var(--color-primary);
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}

.btn-ghost {
  background-color: transparent;
  color: var(--text-secondary);
  border-color: transparent;
}

.btn-ghost:hover:not(:disabled) {
  background-color: var(--bg-secondary);
  color: var(--text-primary);
  border-color: var(--border-primary);
}

.btn-sm {
  padding: var(--spacing-2) var(--spacing-4);
  font-size: var(--text-xs);
  gap: var(--spacing-1);
}

.btn-lg {
  padding: var(--spacing-4) var(--spacing-8);
  font-size: var(--text-base);
  gap: var(--spacing-3);
}

.btn-group {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-4);
  margin-top: var(--spacing-6);
  align-items: center;
  justify-content: flex-start;
}

.btn-group .btn {
  margin-top: 0;
}

/* Button with icon */
.btn svg {
  flex-shrink: 0;
}

/* Button states */
.btn:active {
  transform: translateY(0);
}

.btn:focus {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* Cards */
.card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-xl);
  padding: var(--spacing-8);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-fast);
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-fast);
}

.card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
  border-color: var(--color-primary-light);
}

.card:hover::before {
  transform: scaleX(1);
}

.card-header {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-4);
  margin-bottom: var(--spacing-6);
  padding-bottom: var(--spacing-4);
  border-bottom: 1px solid var(--border-primary);
}

.card-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 3rem;
  height: 3rem;
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
  border-radius: var(--radius-lg);
  color: var(--color-white);
  flex-shrink: 0;
  box-shadow: var(--shadow-sm);
}

.card-icon svg {
  width: 1.25rem;
  height: 1.25rem;
}

.card-title {
  font-size: var(--text-lg);
  font-weight: var(--font-semibold);
  margin-bottom: var(--spacing-2);
  color: var(--text-primary);
  line-height: var(--leading-tight);
}

.card-description {
  color: var(--text-secondary);
  font-size: var(--text-sm);
  margin-bottom: 0;
  line-height: var(--leading-normal);
}

/* Card content spacing */
.card .form-group:last-child {
  margin-bottom: 0;
}

.card .btn-group:last-child {
  margin-top: var(--spacing-4);
  margin-bottom: 0;
}

/* Grid Layouts */
.grid {
  display: grid;
  gap: var(--spacing-6);
}

.grid-1 { grid-template-columns: 1fr; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

@media (max-width: 767px) {
  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }
}

@media (min-width: 768px) and (max-width: 1023px) {
  .grid-3,
  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .grid-4 {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (min-width: 1280px) {
  .grid-4 {
    grid-template-columns: repeat(4, 1fr);
  }
}

/* Result Areas */
.result-area {
  background-color: var(--bg-secondary);
  border: 2px solid var(--border-primary);
  border-radius: var(--radius-lg);
  padding: var(--spacing-5);
  margin-top: var(--spacing-6);
  position: relative;
  min-height: 80px;
  transition: all var(--transition-fast);
}

.result-area:hover {
  border-color: var(--border-focus);
  box-shadow: var(--shadow-sm);
}

.result-content {
  font-family: var(--font-family-mono);
  font-size: var(--text-sm);
  line-height: var(--leading-relaxed);
  color: var(--text-primary);
  white-space: pre-wrap;
  word-break: break-all;
  margin: 0;
  padding-right: var(--spacing-16);
}

.result-area textarea {
  background-color: transparent;
  border: none;
  padding: 0;
  margin: 0;
  resize: none;
  font-family: var(--font-family-mono);
  font-size: var(--text-sm);
  line-height: var(--leading-relaxed);
  color: var(--text-primary);
  width: 100%;
  min-height: 80px;
}

.copy-btn {
  position: absolute;
  top: var(--spacing-3);
  right: var(--spacing-3);
  padding: var(--spacing-2) var(--spacing-3);
  font-size: var(--text-xs);
  font-weight: var(--font-medium);
  background-color: var(--bg-card);
  border: 2px solid var(--border-primary);
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
  box-shadow: var(--shadow-sm);
  z-index: 10;
  opacity: 0.9;
}

.copy-btn:hover {
  background-color: var(--color-primary);
  color: var(--color-white);
  border-color: var(--color-primary);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  opacity: 1;
}

.copy-btn:active {
  transform: translateY(0);
}

/* Result area with textarea */
.result-area:has(textarea) {
  padding: var(--spacing-3);
}

.result-area:has(textarea) .copy-btn {
  top: var(--spacing-2);
  right: var(--spacing-2);
}

/* Toast Notifications */
.toast {
  position: fixed;
  top: var(--spacing-4);
  right: var(--spacing-4);
  z-index: var(--z-toast);
  display: flex;
  align-items: center;
  gap: var(--spacing-3);
  padding: var(--spacing-4) var(--spacing-6);
  background-color: var(--bg-card);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  max-width: 400px;
  transform: translateX(100%);
  transition: transform var(--transition-normal);
}

.toast.show {
  transform: translateX(0);
}

.toast-success {
  border-left: 4px solid var(--color-success);
}

.toast-error {
  border-left: 4px solid var(--color-danger);
}

.toast-warning {
  border-left: 4px solid var(--color-warning);
}

.toast-info {
  border-left: 4px solid var(--color-info);
}

/* Loading States */
.loading {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-2);
  color: var(--text-secondary);
}

.loading-spinner {
  width: 1rem;
  height: 1rem;
  border: 2px solid var(--border-primary);
  border-top: 2px solid var(--color-primary);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

/* Footer */
.footer {
  background-color: var(--bg-secondary);
  border-top: 1px solid var(--border-primary);
  padding: var(--spacing-12) 0 var(--spacing-8);
  margin-top: var(--spacing-16);
}

.footer-content {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-8);
}

@media (min-width: 768px) {
  .footer-content {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .footer-content {
    grid-template-columns: repeat(4, 1fr);
  }
}

.footer-section h4 {
  font-size: var(--text-lg);
  font-weight: var(--font-semibold);
  margin-bottom: var(--spacing-4);
}

.footer-section p,
.footer-section a {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  margin-bottom: var(--spacing-2);
  display: block;
}

.footer-section a:hover {
  color: var(--color-primary);
}

.footer-bottom {
  margin-top: var(--spacing-8);
  padding-top: var(--spacing-6);
  border-top: 1px solid var(--border-primary);
  text-align: center;
  font-size: var(--text-sm);
  color: var(--text-secondary);
}

/* Checkbox Components */
.checkbox-item {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-3);
  cursor: pointer;
  padding: var(--spacing-3);
  border-radius: var(--radius-lg);
  transition: background-color var(--transition-fast);
  margin-bottom: var(--spacing-2);
}

.checkbox-item:hover {
  background-color: var(--bg-secondary);
}

.checkbox-item input {
  display: none;
}

.checkmark {
  width: 20px;
  height: 20px;
  border: 2px solid var(--border-secondary);
  border-radius: var(--radius-sm);
  position: relative;
  flex-shrink: 0;
  margin-top: 2px;
  transition: all var(--transition-fast);
}

.checkbox-item input:checked + .checkmark {
  background-color: var(--color-primary);
  border-color: var(--color-primary);
}

.checkbox-item input:checked + .checkmark::after {
  content: '✓';
  position: absolute;
  color: white;
  font-size: 12px;
  font-weight: bold;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}

.checkbox-item span:not(.checkmark) {
  font-size: var(--text-sm);
  color: var(--text-primary);
  line-height: var(--leading-normal);
}

/* Color Input */
.color-input {
  width: 60px;
  height: 40px;
  border: 2px solid var(--border-primary);
  border-radius: var(--radius-md);
  cursor: pointer;
  background: none;
  padding: 0;
  transition: all var(--transition-fast);
}

.color-input:hover {
  border-color: var(--color-primary);
  transform: scale(1.05);
}

.color-input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

/* File Input */
input[type="file"] {
  padding: var(--spacing-3);
  border: 2px dashed var(--border-primary);
  border-radius: var(--radius-lg);
  background-color: var(--bg-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
}

input[type="file"]:hover {
  border-color: var(--color-primary);
  background-color: var(--bg-tertiary);
}

input[type="file"]:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

/* Utility Classes */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.font-mono { font-family: var(--font-family-mono); }
.font-semibold { font-weight: var(--font-semibold); }
.font-bold { font-weight: var(--font-bold); }
.font-medium { font-weight: var(--font-medium); }

.text-primary { color: var(--text-primary); }
.text-secondary { color: var(--text-secondary); }
.text-tertiary { color: var(--text-tertiary); }
.text-success { color: var(--color-success); }
.text-danger { color: var(--color-danger); }
.text-warning { color: var(--color-warning); }

.hidden { display: none; }
.block { display: block; }
.inline-block { display: inline-block; }
.flex { display: flex; }
.inline-flex { display: inline-flex; }
.grid { display: grid; }

.items-center { align-items: center; }
.items-start { align-items: flex-start; }
.items-end { align-items: flex-end; }

.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.justify-start { justify-content: flex-start; }
.justify-end { justify-content: flex-end; }

.gap-2 { gap: var(--spacing-2); }
.gap-3 { gap: var(--spacing-3); }
.gap-4 { gap: var(--spacing-4); }
.gap-6 { gap: var(--spacing-6); }

.p-4 { padding: var(--spacing-4); }
.p-6 { padding: var(--spacing-6); }
.p-8 { padding: var(--spacing-8); }

.m-4 { margin: var(--spacing-4); }
.mb-4 { margin-bottom: var(--spacing-4); }
.mt-6 { margin-top: var(--spacing-6); }
.mb-6 { margin-bottom: var(--spacing-6); }

.w-full { width: 100%; }
.h-full { height: 100%; }

/* Spacing utilities */
.space-y-2 > * + * { margin-top: var(--spacing-2); }
.space-y-3 > * + * { margin-top: var(--spacing-3); }
.space-y-4 > * + * { margin-top: var(--spacing-4); }

/* Text size utilities */
.text-xs { font-size: var(--text-xs); }
.text-sm { font-size: var(--text-sm); }
.text-base { font-size: var(--text-base); }
.text-lg { font-size: var(--text-lg); }
.text-xl { font-size: var(--text-xl); }

/* Responsive Design Improvements */
@media (max-width: 1023px) {
  .tool-layout {
    grid-template-columns: 1fr;
    gap: var(--spacing-6);
  }
  
  .tool-sidebar {
    position: static;
    order: 2;
    max-height: none;
    overflow-y: visible;
    margin-top: var(--spacing-6);
  }
  
  .tool-content {
    order: 1;
    min-height: auto;
  }
}

@media (max-width: 768px) {
  .container {
    padding: 0 var(--spacing-4);
  }
  
  .main {
    padding: var(--spacing-6) 0;
  }
  
  .tool-content {
    padding: var(--spacing-4);
    margin-bottom: var(--spacing-6);
  }
  
  .card {
    padding: var(--spacing-4);
    margin-bottom: var(--spacing-4);
  }
  
  .card-header {
    flex-direction: column;
    text-align: center;
    gap: var(--spacing-3);
    margin-bottom: var(--spacing-4);
  }
  
  .card-icon {
    align-self: center;
    width: 2.5rem;
    height: 2.5rem;
  }
  
  .card-title {
    font-size: var(--text-base);
  }
  
  .form-row {
    grid-template-columns: 1fr;
    gap: var(--spacing-3);
  }
  
  .btn-group {
    flex-direction: column;
    gap: var(--spacing-3);
    align-items: stretch;
    margin-top: var(--spacing-4);
  }
  
  .btn-group .btn {
    width: 100%;
    justify-content: center;
    min-height: 48px;
  }
  
  .result-area {
    padding: var(--spacing-4);
    margin-top: var(--spacing-4);
  }
  
  .copy-btn {
    position: static;
    margin-top: var(--spacing-3);
    align-self: stretch;
    min-height: 44px;
  }
  
  .tool-header {
    flex-direction: column;
    text-align: center;
    gap: var(--spacing-3);
    margin-bottom: var(--spacing-6);
  }
  
  .tool-icon {
    align-self: center;
    width: 3rem;
    height: 3rem;
  }
  
  .tool-info h1 {
    font-size: var(--text-xl);
  }
  
  .tool-description {
    font-size: var(--text-sm);
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 var(--spacing-3);
  }
  
  .header-content {
    gap: var(--spacing-1);
    padding: 0 var(--spacing-2);
  }
  
  .main {
    padding: var(--spacing-4) 0;
  }
  
  .tool-content {
    padding: var(--spacing-3);
  }
  
  .card {
    padding: var(--spacing-3);
  }
  
  .card-title {
    font-size: var(--text-sm);
  }
  
  .card-description {
    font-size: var(--text-xs);
  }
  
  .tool-header h1 {
    font-size: var(--text-lg);
  }
  
  .tool-description {
    font-size: var(--text-xs);
  }
  
  .result-area {
    padding: var(--spacing-3);
  }
  
  .result-content {
    font-size: var(--text-xs);
  }
  
  .form-input,
  .form-textarea,
  .form-select {
    padding: var(--spacing-2) var(--spacing-3);
    font-size: var(--text-sm);
  }
  
  .btn {
    padding: var(--spacing-2) var(--spacing-4);
    font-size: var(--text-sm);
    min-height: 44px;
  }
  
  .btn-lg {
    padding: var(--spacing-3) var(--spacing-6);
    font-size: var(--text-sm);
  }
}

/* Responsive Utilities */
@media (min-width: 640px) {
  .sm\:block { display: block; }
  .sm\:hidden { display: none; }
  .sm\:grid-cols-2 { grid-template-columns: repeat(2, 1fr); }
  .sm\:flex { display: flex; }
  .sm\:text-sm { font-size: var(--text-sm); }
}

@media (min-width: 768px) {
  .md\:block { display: block; }
  .md\:hidden { display: none; }
  .md\:grid-cols-3 { grid-template-columns: repeat(3, 1fr); }
  .md\:flex { display: flex; }
  .md\:text-base { font-size: var(--text-base); }
}

@media (min-width: 1024px) {
  .lg\:block { display: block; }
  .lg\:hidden { display: none; }
  .lg\:grid-cols-4 { grid-template-columns: repeat(4, 1fr); }
  .lg\:flex { display: flex; }
  .lg\:text-lg { font-size: var(--text-lg); }
}

/* Mobile-first responsive utilities */
@media (max-width: 639px) {
  .mobile-only { display: block; }
  .desktop-only { display: none; }
}

@media (min-width: 640px) {
  .mobile-only { display: none; }
  .desktop-only { display: block; }
}

/* Touch-friendly improvements */
@media (hover: none) and (pointer: coarse) {
  .btn {
    min-height: 48px;
    padding: var(--spacing-3) var(--spacing-5);
  }
  
  .form-input,
  .form-textarea,
  .form-select {
    min-height: 48px;
    padding: var(--spacing-3) var(--spacing-4);
  }
  
  .nav-link {
    padding: var(--spacing-2) var(--spacing-3);
    min-height: 44px;
    display: flex;
    align-items: center;
  }
}

/* Enhanced Hero Section */
.hero-enhanced {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  color: var(--color-white);
  padding: var(--spacing-24) 0 var(--spacing-20);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero-enhanced::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grid" width="10" height="10" patternUnits="userSpaceOnUse"><path d="M 10 0 L 0 0 0 10" fill="none" stroke="rgba(255,255,255,0.1)" stroke-width="0.5"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
  opacity: 0.3;
}

.hero-enhanced .container {
  position: relative;
  z-index: 2;
}

.hero-enhanced .hero-content {
  max-width: 900px;
  margin: 0 auto;
}

.hero-enhanced .hero-title {
  font-size: var(--text-5xl);
  font-weight: var(--font-extrabold);
  margin-bottom: var(--spacing-6);
  background: linear-gradient(45deg, #ffffff, #e0e7ff);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: var(--leading-tight);
}

.hero-enhanced .hero-subtitle {
  font-size: var(--text-2xl);
  font-weight: var(--font-medium);
  margin-bottom: var(--spacing-4);
  opacity: 0.95;
  color: rgba(255, 255, 255, 0.9);
}

.hero-enhanced .hero-description {
  font-size: var(--text-xl);
  margin-bottom: var(--spacing-8);
  opacity: 0.85;
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
  line-height: var(--leading-relaxed);
  color: rgba(255, 255, 255, 0.8);
}

.hero-stats {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: var(--spacing-8);
  margin: var(--spacing-8) 0;
  flex-wrap: wrap;
}

.stat-item {
  text-align: center;
  padding: var(--spacing-4);
  background: rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.2);
  min-width: 120px;
  transition: all 0.3s ease;
}

.stat-item:hover {
  transform: translateY(-2px);
  background: rgba(255, 255, 255, 0.15);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
}

.stat-number {
  font-size: var(--text-3xl);
  font-weight: var(--font-bold);
  color: #ffffff;
  margin-bottom: var(--spacing-1);
  line-height: 1;
}

.stat-label {
  font-size: var(--text-sm);
  color: rgba(255, 255, 255, 0.8);
  font-weight: var(--font-medium);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.hero-actions {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: var(--spacing-4);
  margin-top: var(--spacing-8);
  flex-wrap: wrap;
}

.hero-actions .btn {
  padding: var(--spacing-4) var(--spacing-8);
  font-size: var(--text-lg);
  font-weight: var(--font-semibold);
  border-radius: var(--radius-lg);
  transition: all 0.3s ease;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-2);
  min-width: 180px;
  justify-content: center;
}

.hero-actions .btn-primary {
  background: rgba(255, 255, 255, 0.2);
  color: #ffffff;
  border: 2px solid rgba(255, 255, 255, 0.3);
  backdrop-filter: blur(10px);
}

.hero-actions .btn-primary:hover {
  background: rgba(255, 255, 255, 0.3);
  border-color: rgba(255, 255, 255, 0.5);
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
}

.hero-actions .btn-outline {
  background: transparent;
  color: #ffffff;
  border: 2px solid rgba(255, 255, 255, 0.5);
}

.hero-actions .btn-outline:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.8);
  transform: translateY(-2px);
}

/* Dark theme hero adjustments */
[data-theme="dark"] .hero-enhanced {
  background: linear-gradient(135deg, var(--color-gray-900) 0%, var(--color-gray-800) 100%);
}

[data-theme="dark"] .hero-enhanced .hero-title {
  background: linear-gradient(45deg, #ffffff, #a5b4fc);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* Enhanced Section Styles */
.section {
  padding: var(--spacing-20) 0;
  position: relative;
}

.section.bg-secondary {
  background: var(--bg-secondary);
}

.section-header {
  margin-bottom: var(--spacing-12);
}

.section-header h2 {
  font-size: var(--text-4xl);
  font-weight: var(--font-bold);
  color: var(--text-primary);
  margin-bottom: var(--spacing-4);
  line-height: var(--leading-tight);
}

.section-description {
  font-size: var(--text-xl);
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
  line-height: var(--leading-relaxed);
}

/* Enhanced Grid Layouts */
.grid {
  display: grid;
  gap: var(--spacing-6);
  width: 100%;
}

.grid-1 { grid-template-columns: 1fr; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 768px) {
  .grid-3,
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  
  .section {
    padding: var(--spacing-16) 0;
  }
  
  .section-header h2 {
    font-size: var(--text-3xl);
  }
  
  .section-description {
    font-size: var(--text-lg);
  }
}

@media (max-width: 640px) {
  .grid-2,
  .grid-3,
  .grid-4 { grid-template-columns: 1fr; }
  
  .section {
    padding: var(--spacing-12) 0;
  }
  
  .section-header {
    margin-bottom: var(--spacing-8);
  }
  
  .section-header h2 {
    font-size: var(--text-2xl);
  }
  
  .section-description {
    font-size: var(--text-base);
  }
}

/* Modern Tool Page Layout */
.modern-tool-page {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Tool Hero Section */
.tool-hero-section {
  background: linear-gradient(135deg, var(--bg-secondary), var(--bg-card));
  border-bottom: 1px solid var(--border-primary);
  padding: var(--spacing-8) 0;
}

.tool-hero-content {
  display: flex;
  align-items: center;
  gap: var(--spacing-6);
  max-width: 1200px;
  margin: 0 auto;
}

.tool-hero-icon {
  flex-shrink: 0;
  width: 80px;
  height: 80px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
  border-radius: var(--radius-xl);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  box-shadow: var(--shadow-lg);
}

.tool-hero-title {
  font-size: var(--text-4xl);
  font-weight: var(--font-bold);
  color: var(--text-primary);
  margin: 0 0 var(--spacing-3) 0;
  line-height: var(--leading-tight);
}

.tool-hero-description {
  font-size: var(--text-xl);
  color: var(--text-secondary);
  margin: 0;
  line-height: var(--leading-relaxed);
}

/* Tool Main Section - Full Width */
.tool-main-section {
  flex: 1;
  background: var(--bg-primary);
  padding: var(--spacing-8) 0;
  min-height: 60vh;
}

.tool-workspace {
  width: 100%;
  max-width: none;
  padding: 0 var(--spacing-4);
  margin: 0 auto;
}

/* Override tool-specific constraints */
.tool-workspace .main,
.tool-workspace .container,
.tool-workspace .tool-layout,
.tool-workspace .tool-content {
  max-width: none !important;
  width: 100% !important;
  padding-left: 0 !important;
  padding-right: 0 !important;
}

.tool-workspace .main .container {
  padding: 0 !important;
  max-width: none !important;
}

/* Tool Info Section */
.tool-info-section {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-primary);
  padding: var(--spacing-12) 0;
}

.tool-info-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: var(--spacing-8);
  max-width: 1200px;
  margin: 0 auto;
}

.tool-info-grid .card {
  height: fit-content;
  transition: all 0.3s ease;
  border: 1px solid var(--border-primary);
  box-shadow: var(--shadow-sm);
}

.tool-info-grid .card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
  border-color: var(--color-primary-light);
}

/* Responsive Design */
@media (max-width: 1024px) {
  .tool-workspace {
    padding: 0 var(--spacing-6);
  }
  
  .tool-hero-content {
    max-width: 100%;
    padding: 0 var(--spacing-6);
  }
}

@media (max-width: 768px) {
  .tool-hero-section {
    padding: var(--spacing-6) 0;
  }
  
  .tool-hero-content {
    flex-direction: column;
    text-align: center;
    gap: var(--spacing-4);
    padding: 0 var(--spacing-4);
  }
  
  .tool-hero-icon {
    width: 64px;
    height: 64px;
  }
  
  .tool-hero-title {
    font-size: var(--text-3xl);
  }
  
  .tool-hero-description {
    font-size: var(--text-lg);
  }
  
  .tool-main-section {
    padding: var(--spacing-6) 0;
  }
  
  .tool-workspace {
    padding: 0 var(--spacing-3);
  }
  
  .tool-info-section {
    padding: var(--spacing-8) 0;
  }
  
  .tool-info-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-6);
    padding: 0 var(--spacing-4);
  }
}

@media (max-width: 480px) {
  .tool-workspace {
    padding: 0 var(--spacing-2);
  }
  
  .tool-hero-content {
    padding: 0 var(--spacing-3);
  }
}

/* Feature Cards */
.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-lg);
  padding: var(--spacing-6);
  text-align: center;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s ease;
}

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-primary);
}

.feature-card:hover::before {
  transform: scaleX(1);
}

.feature-icon {
  font-size: 3rem;
  margin-bottom: var(--spacing-4);
  display: block;
}

.feature-card h3 {
  font-size: var(--text-xl);
  font-weight: var(--font-semibold);
  color: var(--text-primary);
  margin-bottom: var(--spacing-3);
}

.feature-card p {
  color: var(--text-secondary);
  line-height: var(--leading-relaxed);
  margin: 0;
}

/* Enhanced Loading States */
.loading-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-16);
  min-height: 400px;
}

.loading-spinner-enhanced {
  width: 48px;
  height: 48px;
  border: 4px solid var(--color-gray-200);
  border-top: 4px solid var(--color-primary);
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin-bottom: var(--spacing-4);
}

.loading-dots {
  display: flex;
  gap: var(--spacing-2);
  margin-bottom: var(--spacing-4);
}

.loading-dot {
  width: 8px;
  height: 8px;
  background-color: var(--color-primary);
  border-radius: 50%;
  animation: loadingDots 1.4s ease-in-out infinite both;
}

.loading-dot:nth-child(1) { animation-delay: -0.32s; }
.loading-dot:nth-child(2) { animation-delay: -0.16s; }

@keyframes loadingDots {
  0%, 80%, 100% {
    transform: scale(0);
    opacity: 0.5;
  }
  40% {
    transform: scale(1);
    opacity: 1;
  }
}

/* Enhanced Tool Cards */
.tool-card-enhanced {
  background: var(--bg-card);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-lg);
  padding: var(--spacing-6);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  overflow: hidden;
  text-decoration: none;
  color: inherit;
  display: block;
}

.tool-card-enhanced::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s ease;
}

.tool-card-enhanced:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
  border-color: var(--color-primary);
}

.tool-card-enhanced:hover::before {
  transform: scaleX(1);
}

.tool-card-enhanced .card-header {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-4);
  margin-bottom: var(--spacing-4);
}

.tool-card-enhanced .card-icon {
  flex-shrink: 0;
  width: 48px;
  height: 48px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
}

.tool-card-enhanced .card-title {
  font-size: var(--text-lg);
  font-weight: var(--font-semibold);
  color: var(--text-primary);
  margin: 0 0 var(--spacing-2) 0;
  line-height: var(--leading-tight);
}

.tool-card-enhanced .card-description {
  color: var(--text-secondary);
  font-size: var(--text-sm);
  line-height: var(--leading-normal);
  margin: 0;
}

.popular-badge {
  position: absolute;
  top: var(--spacing-4);
  right: var(--spacing-4);
  background: linear-gradient(135deg, var(--color-accent), #f97316);
  color: white;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-md);
  transition: all var(--transition-fast);
}

.popular-badge:hover {
  transform: scale(1.1);
  box-shadow: var(--shadow-lg);
}

.popular-badge::before {
  content: '★';
  font-size: 16px;
  font-weight: bold;
}

/* Enhanced Category Cards */
.category-card-enhanced {
  background: var(--bg-card);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-lg);
  padding: var(--spacing-6);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  text-decoration: none;
  color: inherit;
  display: block;
  position: relative;
  overflow: hidden;
}

.category-card-enhanced::after {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  width: 4px;
  background: linear-gradient(180deg, var(--color-primary), var(--color-secondary));
  transform: scaleY(0);
  transform-origin: bottom;
  transition: transform 0.3s ease;
}

.category-card-enhanced:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-primary);
}

.category-card-enhanced:hover::after {
  transform: scaleY(1);
}

.category-card-enhanced .category-icon {
  font-size: 2.5rem;
  margin-bottom: var(--spacing-3);
  display: block;
}

.category-card-enhanced .card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: var(--spacing-4);
  padding-top: var(--spacing-4);
  border-top: 1px solid var(--border-primary);
}

.tool-count {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  font-weight: var(--font-medium);
}

/* Enhanced Filter Buttons */
.filter-buttons-enhanced {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-3);
  margin-bottom: var(--spacing-8);
  justify-content: center;
}

.filter-btn-enhanced {
  background: var(--bg-secondary);
  border: 2px solid var(--border-primary);
  border-radius: var(--radius-full);
  padding: var(--spacing-3) var(--spacing-6);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.2s ease;
  position: relative;
  overflow: hidden;
}

.filter-btn-enhanced::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
  transition: left 0.5s ease;
}

.filter-btn-enhanced:hover::before {
  left: 100%;
}

.filter-btn-enhanced:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  transform: translateY(-1px);
}

.filter-btn-enhanced.active {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: white;
  box-shadow: var(--shadow-md);
}

.filter-btn-enhanced.active:hover {
  background: var(--color-primary-dark);
  border-color: var(--color-primary-dark);
}

/* Enhanced Search Results */
.search-results-container {
  margin-bottom: var(--spacing-6);
  padding: var(--spacing-4) var(--spacing-6);
  background: var(--bg-secondary);
  border-radius: var(--radius-lg);
  border-left: 4px solid var(--color-primary);
}

.search-results-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-4);
}

.search-results-count {
  font-size: var(--text-sm);
  color: var(--text-primary);
  font-weight: var(--font-medium);
}

.search-clear-btn {
  background: transparent;
  border: 1px solid var(--color-primary);
  color: var(--color-primary);
  padding: var(--spacing-2) var(--spacing-4);
  border-radius: var(--radius-md);
  font-size: var(--text-xs);
  cursor: pointer;
  transition: all 0.2s ease;
}

.search-clear-btn:hover {
  background: var(--color-primary);
  color: white;
}

/* Enhanced Form Elements */
.form-group-enhanced {
  margin-bottom: var(--spacing-6);
}

.form-label-enhanced {
  display: block;
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--text-primary);
  margin-bottom: var(--spacing-2);
}

.form-input-enhanced,
.form-textarea-enhanced {
  width: 100%;
  padding: var(--spacing-4);
  border: 2px solid var(--border-primary);
  border-radius: var(--radius-md);
  font-size: var(--text-base);
  font-family: inherit;
  background: var(--bg-primary);
  color: var(--text-primary);
  transition: all 0.2s ease;
  resize: vertical;
}

.form-input-enhanced:focus,
.form-textarea-enhanced:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.form-input-enhanced::placeholder,
.form-textarea-enhanced::placeholder {
  color: var(--text-tertiary);
}

/* Enhanced Result Areas */
.result-area-enhanced {
  position: relative;
}

.result-area-enhanced .copy-btn-enhanced {
  position: absolute;
  top: var(--spacing-3);
  right: var(--spacing-3);
  background: var(--color-primary);
  color: white;
  border: none;
  padding: var(--spacing-2) var(--spacing-3);
  border-radius: var(--radius-md);
  font-size: var(--text-xs);
  cursor: pointer;
  transition: all 0.2s ease;
  opacity: 0;
  transform: translateY(-4px);
}

.result-area-enhanced:hover .copy-btn-enhanced {
  opacity: 1;
  transform: translateY(0);
}

.copy-btn-enhanced:hover {
  background: var(--color-primary-dark);
}

/* Enhanced Status Messages */
.status-message {
  padding: var(--spacing-4);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  display: flex;
  align-items: center;
  gap: var(--spacing-3);
  margin: var(--spacing-4) 0;
}

.status-message.success {
  background: #ecfdf5;
  border: 1px solid #a7f3d0;
  color: #065f46;
}

.status-message.error {
  background: #fef2f2;
  border: 1px solid #fecaca;
  color: #991b1b;
}

.status-message.warning {
  background: #fffbeb;
  border: 1px solid #fed7aa;
  color: #92400e;
}

.status-message.info {
  background: #eff6ff;
  border: 1px solid #bfdbfe;
  color: #1e40af;
}

/* Animation Classes */
.fade-in {
  animation: fadeIn 0.5s ease-in-out;
}

.slide-in-up {
  animation: slideInUp 0.5s ease-out;
}

.bounce-in {
  animation: bounceIn 0.6s cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

.scale-in {
  animation: scaleIn 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.slide-in-right {
  animation: slideInRight 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes slideInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes slideInRight {
  from {
    opacity: 0;
    transform: translateX(30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes scaleIn {
  from {
    opacity: 0;
    transform: scale(0.8);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

@keyframes bounceIn {
  0% {
    opacity: 0;
    transform: scale3d(0.3, 0.3, 0.3);
  }
  50% {
    opacity: 1;
  }
  100% {
    opacity: 1;
    transform: scale3d(1, 1, 1);
  }
}

@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

@keyframes pulse {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0.5;
  }
}

/* Dark theme enhancements */
[data-theme="dark"] {
  --bg-primary: var(--color-gray-900);
  --bg-secondary: var(--color-gray-800);
  --bg-tertiary: var(--color-gray-700);
  --bg-card: var(--color-gray-800);
  
  --text-primary: var(--color-gray-100);
  --text-secondary: var(--color-gray-400);
  --text-tertiary: var(--color-gray-500);
  
  --border-primary: var(--color-gray-700);
  --border-secondary: var(--color-gray-600);
}

[data-theme="dark"] .tool-card-enhanced:hover {
  box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.3), 0 10px 10px -5px rgba(0, 0, 0, 0.1);
}

[data-theme="dark"] .category-card-enhanced:hover {
  box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.3), 0 4px 6px -2px rgba(0, 0, 0, 0.1);
}

[data-theme="dark"] .status-message.success {
  background: rgba(6, 95, 70, 0.1);
  border-color: rgba(167, 243, 208, 0.2);
  color: #a7f3d0;
}

[data-theme="dark"] .status-message.error {
  background: rgba(153, 27, 27, 0.1);
  border-color: rgba(254, 202, 202, 0.2);
  color: #fecaca;
}

[data-theme="dark"] .status-message.warning {
  background: rgba(146, 64, 14, 0.1);
  border-color: rgba(254, 215, 170, 0.2);
  color: #fed7aa;
}

[data-theme="dark"] .status-message.info {
  background: rgba(30, 64, 175, 0.1);
  border-color: rgba(191, 219, 254, 0.2);
  color: #bfdbfe;
}

/* Progress Manager Styles */
.progress-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--bg-overlay);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 10000;
}

.progress-modal {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  padding: var(--spacing-8);
  box-shadow: var(--shadow-xl);
  min-width: 400px;
  max-width: 90vw;
}

.progress-content {
  text-align: center;
}

.progress-message {
  font-size: var(--text-lg);
  font-weight: var(--font-medium);
  color: var(--text-primary);
  margin-bottom: var(--spacing-6);
}

.progress-bar-container {
  margin-bottom: var(--spacing-6);
}

.progress-bar {
  width: 100%;
  height: 8px;
  background: var(--color-gray-200);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
  border-radius: var(--radius-full);
  transition: width 0.3s ease;
}

.progress-percentage {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  margin-top: var(--spacing-2);
}

[data-theme="dark"] .progress-bar {
  background: var(--color-gray-700);
}

/* Enhanced Animation Classes */
.animate-on-scroll {
  opacity: 0;
  transform: translateY(20px);
  transition: all 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.animate-on-scroll.animate-in {
  opacity: 1;
  transform: translateY(0);
}

.fade-out {
  animation: fadeOut 0.3s ease-out forwards;
}

@keyframes fadeOut {
  from { opacity: 1; }
  to { opacity: 0; }
}

/* Enhanced Form Validation */
.form-input-enhanced.error,
.form-textarea-enhanced.error {
  border-color: var(--color-danger);
  box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.1);
}

.validation-error {
  color: var(--color-danger);
  font-size: var(--text-xs);
  margin-top: var(--spacing-1);
  display: flex;
  align-items: center;
  gap: var(--spacing-2);
}

.validation-error::before {
  content: '⚠';
  font-size: var(--text-sm);
}

/* Enhanced Responsive Utilities */
@media (max-width: 768px) {
  .hero-enhanced {
    padding: var(--spacing-16) 0 var(--spacing-12);
  }
  
  .hero-enhanced .hero-title {
    font-size: var(--text-4xl);
  }
  
  .hero-enhanced .hero-subtitle {
    font-size: var(--text-xl);
  }
  
  .hero-enhanced .hero-description {
    font-size: var(--text-lg);
    padding: 0 var(--spacing-4);
  }
  
  .hero-stats {
    gap: var(--spacing-4);
    margin: var(--spacing-6) 0;
  }
  
  .stat-item {
    min-width: 100px;
    padding: var(--spacing-3);
  }
  
  .stat-number {
    font-size: var(--text-2xl);
  }
  
  .hero-actions {
    flex-direction: column;
    gap: var(--spacing-3);
    padding: 0 var(--spacing-4);
  }
  
  .hero-actions .btn {
    width: 100%;
    max-width: 280px;
    padding: var(--spacing-4) var(--spacing-6);
  }
}

@media (max-width: 640px) {
  .hero-stats {
    flex-direction: column;
    gap: var(--spacing-3);
    align-items: center;
  }
  
  .stat-item {
    min-width: 200px;
    width: 100%;
    max-width: 250px;
  }
  
  .hero-enhanced .hero-title {
    font-size: var(--text-3xl);
  }
  
  .hero-enhanced .hero-subtitle {
    font-size: var(--text-lg);
  }
  
  .hero-enhanced .hero-description {
    font-size: var(--text-base);
  }

  .tool-card-enhanced {
    padding: var(--spacing-4);
  }
  
  .category-card-enhanced {
    padding: var(--spacing-4);
  }
  
  .filter-buttons-enhanced {
    gap: var(--spacing-2);
  }
  
  .filter-btn-enhanced {
    padding: var(--spacing-2) var(--spacing-4);
    font-size: var(--text-xs);
  }
  
  .progress-modal {
    min-width: auto;
    margin: var(--spacing-4);
    padding: var(--spacing-6);
  }
}

/* Accessibility Improvements */
@media (prefers-reduced-motion: reduce) {
  .tool-card-enhanced,
  .category-card-enhanced,
  .filter-btn-enhanced,
  .animate-on-scroll {
    transition: none;
    animation: none;
  }
  
  .loading-spinner-enhanced {
    animation: none;
    border-top-color: var(--color-primary);
  }
  
  .loading-dot {
    animation: none;
    opacity: 1;
    transform: scale(1);
  }
}

/* High Contrast Mode Support */
@media (prefers-contrast: high) {
  .tool-card-enhanced,
  .category-card-enhanced {
    border-width: 2px;
  }
  
  .btn {
    border-width: 2px;
  }
  
  .form-input-enhanced,
  .form-textarea-enhanced {
    border-width: 2px;
  }
}

/* Print Styles */
@media print {
  .header,
  .footer,
  .theme-toggle,
  .btn,
  .no-print {
    display: none !important;
  }
  
  .main {
    padding: 0;
  }
  
  .tool-content {
    box-shadow: none;
    border: 1px solid #000;
  }
}